Camelbak Hydration Pack Maximum Gear Cordura Thermobak 2L, With Bladder The Camelbak Maximum Gear Cordura Thermobak 2L hydration pack is a medium-sized backpack designed for hiking. Made with durable DuPont Cordura material, it has a snap closure and one pocket for easy access to your essentials. The pack is color black and includes a 2L capacity Thermoback 2L model, perfect for staying hydrated during outdoor adventures. The nylon frame is comfortable for long hikes, making it a versatile choice for both men and women.